One of the things bloggers brought with them when they started attending conferences is live coverage. Unlike the traditional press, which would provide you with a summary of the proceedings the next day, bloggers would be madly photographing, taking notes, uploading, and hitting publish in the minutes following the end of a presentation.

Then Twitter showed up, and everybody started a-tweeting, and more particularly live-tweeting during conferences.

But live-tweeting does not replace live-blogging. It replaces the IRC backchannel, allowing people to comment on what is going on as it happens, and letting people who are not physically present take part in the fun.

(I’m not going to talk about backchannels here: they’re great, but can also have unpleasantconsequences in certain situations. A whole series of blog posts could be devoted to them.)

So when bloggers at conferences neglect their blogs and spend all their time live-tweeting, they are in fact fooling around in the backchannel instead of doing what bloggers do, which is produce content which retains value months, sometimes years, after it was published.

Don’t get me wrong: live-tweeting is fine, so is participation in a more traditional IRC-based backchannel. But don’t confuse it with live-blogging.

Tweets of the moment, just like IRC conversations, tend to be great when consumed in real time. But as the days and weeks go by, they become just as pleasant to read as an IRC log. (Understand: not pleasant at all.)

So, dear bloggers, when you’re at a conference to provide coverage, do not forget who you are. Not everybody is a live-blogger, of course, and some produce very valuablewriting about an event they attended once they are home and have allowed the dust to settle.